Question

当我执行datagramChannel.joinGroup（multicastAddress，networkInterface）时，我得到UnsupportedOperationException;如果我做错了，请告诉我。我正在尝试使用NiodatagramChannel加入多播组。我不想使用OioDatagramChannel。线程“main”java.lang.UnsupportedOperationException中的异常在org.jboss.netty.channel.socket.nio.NioDatagramChannel.joinGroup（NioDatagramChannel.java:337） at io.netty.example.qotm.MulticastReceiver.run（MulticastReceiver.java:36） at io.netty.example.qotm.MulticastReceiver.main（MulticastReceiver.java:51）

import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.concurrent.Executors;
import org.jboss.netty.bootstrap.ConnectionlessBootstrap;
import org.jboss.netty.channel.socket.DatagramChannel;
import org.jboss.netty.channel.socket.DatagramChannelFactory;
import org.jboss.netty.channel.socket.nio.NioDatagramChannelFactory;

public class MulticastReceiver {
private static ConnectionlessBootstrap connectionlessBootstrap;
public void run() {
    DatagramChannelFactory datagramChannelFactory = new   NioDatagramChannelFactory(
            Executors.newCachedThreadPool());

    connectionlessBootstrap = new ConnectionlessBootstrap(
            datagramChannelFactory);
    connectionlessBootstrap.setPipelineFactory(new ServerPipelineFactory());
    connectionlessBootstrap.setOption("reuseAddress", "reuseAddress");

    DatagramChannel datagramChannel = (DatagramChannel) connectionlessBootstrap
            .bind(new InetSocketAddress(8888));
    InetSocketAddress multicastAddress = new InetSocketAddress("224.2.2.3",
            8888);
    NetworkInterface networkInterface;
    try {
        networkInterface = NetworkInterface.getByInetAddress(InetAddress
                .getByName("224.2.2.3"));
        datagramChannel.joinGroup(multicastAddress, networkInterface);
        // datagramChannel.connect(new InetSocketAddress("239.195.255.255",
        // 8888));
    } catch (SocketException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (UnknownHostException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

Answer 1

多播仅在使用java 7+时支持。好像你使用的是早期版本。我将改进错误信息，以便更清楚地了解原因。

网状+ NIOdatagramChannel +组播+的Protobuf

1 个答案: